As a Wi-Fi work? Understand the technology – Globo.com

Wi-Fi networks are increasingly common in our day to day, and everyone talks about them, it is time to install a router at home or ask the password at some restaurant. But you know how they work wireless networks? Check out our matter and understand everything about this technology.

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The history of Wi Fi

The wireless Internet, or wireless, emerged at the end of the 90s, when the first computers with some portability began to gain a significant following. Today, they are extremely popular. Wi-Fi, in turn, is a type of wireless developed for the creation of local computer networks, smartphones and video games, using routers.

Wi-Fi stands for “wireless fidelity” , name given in reference to the term “Hi-Fi” (High Fidelity), used by the recording industry in the 50 The term was recorded by the Wi-Fi Alliance, but became very popular and is given to any WLAN technology ( Wireless Local Area Network).

How it works

Wi-Fi networks make use of common radio waves to transmit the Internet information, as with television, radio and mobile phone, for example. These networks operate using radio waves transmitted through an adapter, the router, which receives signals, decode and broadcast from an antenna, and the main part of the Wi-Fi. So choose well which router will buy.

The Internet signals from routers can reach via cable, telephone line or radio waves, such as the “3G” until the devices that support this technology. For a device has access to these signs, it must be within the “hotspot”, ie within a certain radius of action.

The exchange of information takes place in one of the two frequencies available by governments, the 2.4 GHz or 5 GHz. The higher the frequency, the higher also the signal carrying capacity for a high number information. But ultimately, how these devices communicate

Communication between devices

The communication between the devices connected to the Wi-Fi network is made through the 802.11 protocol, which enables them to recognize each other’s information. This protocol presents variations, a, b, g and n.

The 802.11b has a lower cost than the others, uses a frequency of 2.4 GHz and speeds up to 11 megabits per second. Have 802.11a transmits the information on the 5GHz band with up to 54 megabits per second and is considered more efficient than the previous model, to have better frequency and speed nearly five times faster.

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The 802.11g version is much faster than “b”, despite using the same frequency of 2.4GHz. This is because it uses the same standard technique “to” split signal to avoid interference, achieving the same 54 megabits per second. This model is the most commonly found on the market today. Have 802.11n is the newest and was created with the goal of increasing both the scope and the transmission signal and has limit of up to 140 megabits per second.

There is also the forecast launch in 2015 the new standard, 802.11ad, Samsung, which announced in October 2014 the development of Wi-Fi 60GHz technology.

Advantages and how to use

Now that you know how the Wi-Fi networks have emerged, how they work and how they communicate, may be wondering what the benefits of using this type of network technology. The main advantage is the ability to allow computers and other devices can transmit data to each other without the need for wires or cables.

To make better use of your Wi-Fi network, check our tips on how to position the router and other techniques to optimize the connectivity of your wireless network.